'Nother couple good ones:
Now watching those isn't going to make me go out and get a Visa (already done, haha....), but it's a commercial that's uplifting. Even if you don't buy the product, if it's uplifting, perhaps it helps get you out of a foul mood, perhaps it makes your day, gives you a new perspective, strengthens your convictions (as anyone who plays sports, those two commercials would really give you something to drive for), then isn't it worth it? I think so.
I always thought these two were pretty entertaining as well:
Not that a condone drug use, but can you imagine watching that while on PCP? That'd be crazy.